Machine for sensitizing papers and other fabrics



Jul 15, 1924. 1,5@11,332

B. J. HALL I MACHINE FOR SENSITIZING PAPERS AND OTHER FABRIC6 FiledMarch 3, I922 2 Sh'eets$heet 1 July 15 1924. 1,501,332

J. HALL MACHINE FOR SENSITIZING PAPERS AND bTHER FABRICS Filedjdarch 3,1922 2 shaman: 2

Patented July 15, 1924.

ice.

BENJAMIN JAMES HALL, OF EASTCOTE, ENGLAND.

MACHINE FOR SENSITIZING PAPERS AND OTHER FABRICS.

Application filed March 3, 1922. Serial No. 540,823.

In the coating of blue print paper, after' the application anddistribution of the sensitizer, the material has to be dried, and thisis at presentaccomplished by passing the material through a chambercontaining hot air.

The sensitizing process is rapid, but the process of drying by hot airis necessarily slow, and in order to obtain an adequate output thedrying chamber has to be of considerable size involving large floorspace or other inconveniences.

Now, according to my invention, I use a hollow body or bodies, which Iterm the radiator, heated internally by hot water or steam or gas orelectricity. Or heated on one surface by gas, electricity or the like,in which case the radiator may be solid.

The outer surface of the radiator is preferably convex and presents asmooth surface over which the coated paper is drawn and dried, theuncoated side of the paper being in contact with the radiator.

The radiator may be constructed of any suitable material or materialsand waste radiation of heat prevented by the application of non-heatconducting material Where possible.

In order that the invention may be clearly understood I have appendedthe accompanying drawings.

Fig. 1 is a side elevation of the machine constructed according to myinvention.

' Fig. 2 is a back elevation.

A represents the hollow body which may be heated by hot water, steam,gas or electricity and which I term the radiator, B the reel of paper, Dthe trough or bath containing the coating liquid, E the coating rollerwhich revolves in the bath D, e the guide rollers which guide the paperover the roller E, F the draining board which drains the superfluousliquid from the paper back into the trough D, e the guide rollers whichguide the paper over the radiator A, the un-' coated side of the paperbeing in contact with said radiator, H the scraper which scrapes thecoated side of the paper as it passes over guide rollers 6 a anotherguide roller which guides the paper, as it leaves the radiator, to thetake off rollers J, and K the board or table on to which the paper isdischarged as it leaves the take oii' rollers.

Asthe paper, shown in dotted lines Fig. 1, is drawn from the reel B itfirst passes under one of the guide rollers 0 then over the coatingroller E and under the other guide roller 6 and from thence over guiderollers (2 the coated surface of the paper at this point being scrapedby the scraper H or scrapers-as it passes over these latter rollers. Thepaper now passes in contact with the one surface of radiator A and thenaround roller e and in contact with a second surface of radiator A andfrom thence under guide roller 6 to the take ofl rollers J.

The hollow body A is a vertical heating chamber having plane surfaces atits front and rear sides which are arranged at an acute angle to eachother, with the apex of the chamber at its top, and the guide roller 6arranged above its top. The moist material rests against the front andrear sides of the chamber, and these sides may be covered with anyapproved protecting material to prevent injury to the moist material bydirect contact with the sides of the chamber.

It will be seen by constructing a machine in the manner herein set forththat the floor space occupied to accomplish both the coating and dryingoperations is little if any extra to the floor space required for amachine in which the coating operation only is performed and that as aconsiderable area of heating surface is provided over which the paperhas to travel the drying process is completed without delaying thecoating operation.

What I claim as my invention and desire to secure by Letters Patentis 1. In a sensitizing machine, a coating device for applying fluid tothe material, a vertical heating chamber having its front and rear sidesarranged atan acute angle to each other, a guide roller arranged abovethe apex of the chamber, front and rear guide rollers arranged adjacentto the lower part of the chamber, and means for drawing the material tobe sensitized through the coating device and over the said guide rollersso that it is dried by the heated front and rear sides of the saidchamber.

5 2. A sensitizing machine as set forth in claim 1, provided with twofront guide rollers arranged one above the other, and means for scrapingthe coated surface of the material in its passage between the said 10front guide rollers.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

BENJAMIN JAMES HALL.

Vitnesses CHARLES J. FALCONER, H. \V. DENTON INGRAM.

